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Why doesn't Java JTextArea get all the embedded text?

Using the drag and drop tool NetBeans 6.8 (Mac Version) to create a graphical interface, I developed JTextArea, which the user must insert their data, which the program will change and show them.

It works fine; however, when I tried to paste about 65 thousand lines of test data into JTextArea, the GUI showed only some of these lines (for example, 50 or less) ... for some reason, it refused to paste all the test data that I copied from Notepad "

I thought that JTextArea is full or something else, but when I tried to type more text manually (after inserting test data), it printed and showed in the text box!

Any idea what is going on?

Update 001

I get the following error

Java.lang.OutOfMemoryError: Java heap spaces

Update 002

package bossconverter;

import org.jdesktop.application.Action;
import org.jdesktop.application.ResourceMap;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import org.jdesktop.application.TaskMonitor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
import javax.swing.Icon;
import javax.swing.JDialog;
import javax.swing.JFrame;

/**
 * The application main frame.
 */
public class BOSSConverterView extends FrameView {

public BOSSConverterView(SingleFrameApplication app) {
    super(app);

    initComponents();

    // status bar initialization - message timeout, idle icon and busy animation, etc
    ResourceMap resourceMap = getResourceMap();
    int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
    messageTimer = new Timer(messageTimeout, new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            statusMessageLabel.setText("");
        }
    });
    messageTimer.setRepeats(false);
    int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
    for (int i = 0; i < busyIcons.length; i++) {
        busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
    }
    busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
            statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
        }
    });
    idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
    statusAnimationLabel.setIcon(idleIcon);
    progressBar.setVisible(false);

    // connecting action tasks to status bar via TaskMonitor
    TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
    taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
        public void propertyChange(java.beans.PropertyChangeEvent evt) {
            String propertyName = evt.getPropertyName();
            if ("started".equals(propertyName)) {
                if (!busyIconTimer.isRunning()) {
                    statusAnimationLabel.setIcon(busyIcons[0]);
                    busyIconIndex = 0;
                    busyIconTimer.start();
                }
                progressBar.setVisible(true);
                progressBar.setIndeterminate(true);
            } else if ("done".equals(propertyName)) {
                busyIconTimer.stop();
                statusAnimationLabel.setIcon(idleIcon);
                progressBar.setVisible(false);
                progressBar.setValue(0);
            } else if ("message".equals(propertyName)) {
                String text = (String)(evt.getNewValue());
                statusMessageLabel.setText((text == null) ? "" : text);
                messageTimer.restart();
            } else if ("progress".equals(propertyName)) {
                int value = (Integer)(evt.getNewValue());
                progressBar.setVisible(true);
                progressBar.setIndeterminate(false);
                progressBar.setValue(value);
            }
        }
    });
}

@Action
public void showAboutBox() {
    if (aboutBox == null) {
        JFrame mainFrame = BOSSConverterApp.getApplication().getMainFrame();
        aboutBox = new BOSSConverterAboutBox(mainFrame);
        aboutBox.setLocationRelativeTo(mainFrame);
    }
    BOSSConverterApp.getApplication().show(aboutBox);
}

/** This method is called from within the constructor to
 * initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is
 * always regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

    mainPanel = new javax.swing.JPanel();
    jScrollPane1 = new javax.swing.JScrollPane();
    jTextArea1 = new javax.swing.JTextArea();
    jScrollPane2 = new javax.swing.JScrollPane();
    jTextArea2 = new javax.swing.JTextArea();
    jButton1 = new javax.swing.JButton();
    menuBar = new javax.swing.JMenuBar();
    javax.swing.JMenu fileMenu = new javax.swing.JMenu();
    javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
    javax.swing.JMenu helpMenu = new javax.swing.JMenu();
    javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
    statusPanel = new javax.swing.JPanel();
    javax.swing.JSeparator statusPanelSeparator = new javax.swing.JSeparator();
    statusMessageLabel = new javax.swing.JLabel();
    statusAnimationLabel = new javax.swing.JLabel();
    progressBar = new javax.swing.JProgressBar();

    mainPanel.setName("mainPanel"); // NOI18N

    jScrollPane1.setName("jScrollPane1"); // NOI18N

    jTextArea1.setColumns(20);
    jTextArea1.setRows(5);
    jTextArea1.setName("jTextArea1"); // NOI18N
    jScrollPane1.setViewportView(jTextArea1);

    jScrollPane2.setName("jScrollPane2"); // NOI18N

    jTextArea2.setColumns(20);
    jTextArea2.setRows(5);
    jTextArea2.setName("jTextArea2"); // NOI18N
    jScrollPane2.setViewportView(jTextArea2);

    org.jdesktop.application.ResourceMap resourceMap =
                org.jdesktop.application.Application.getInstance
                  (bossconverter.BOSSConverterApp.class).getContext()
                  .getResourceMap(BOSSConverterView.class);
    jButton1.setText(resourceMap.getString("jButton1.text")); // NOI18N
    jButton1.setName("jButton1"); // NOI18N
    jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
        public void mouseClicked(java.awt.event.MouseEvent evt) {
            tester(evt);
        }
    });

    org.jdesktop.layout.GroupLayout mainPanelLayout =
                 new org.jdesktop.layout.GroupLayout(mainPanel);
    mainPanel.setLayout(mainPanelLayout);
    mainPanelLayout.setHorizontalGroup(
        mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
        .add(mainPanelLayout.createSequentialGroup()
            .addContainerGap()
            .add(mainPanelLayout.createParallelGroup(org.jdesktop.layout
                                                     .GroupLayout.LEADING)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                     383, Short.MAX_VALUE)
                .add(jScrollPane2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                     383, Short.MAX_VALUE)
                .add(org.jdesktop.layout.GroupLayout.TRAILING, jButton1))
            .addContainerGap())
    );
    mainPanelLayout.setVerticalGroup(
        mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
        .add(mainPanelLayout.createSequentialGroup()
            .addContainerGap()
            .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                 98, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .add(18, 18, 18)
            .add(jScrollPane2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                 97, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
            .add(jButton1)
            .addContainerGap(22, Short.MAX_VALUE))
    );

    menuBar.setName("menuBar"); // NOI18N

    fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
    fileMenu.setName("fileMenu"); // NOI18N

    javax.swing.ActionMap actionMap = org.jdesktop.application.Application
                                      .getInstance(bossconverter.BOSSConverterApp
                                      .class).getContext().getActionMap
                                      (BOSSConverterView.class, this);
    exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
    exitMenuItem.setName("exitMenuItem"); // NOI18N
    fileMenu.add(exitMenuItem);

    menuBar.add(fileMenu);

    helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
    helpMenu.setName("helpMenu"); // NOI18N

    aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
    aboutMenuItem.setName("aboutMenuItem"); // NOI18N
    helpMenu.add(aboutMenuItem);

    menuBar.add(helpMenu);

    statusPanel.setName("statusPanel"); // NOI18N

    statusPanelSeparator.setName("statusPanelSeparator"); // NOI18N

    statusMessageLabel.setName("statusMessageLabel"); // NOI18N

    statusAnimationLabel.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
    statusAnimationLabel.setName("statusAnimationLabel"); // NOI18N

    progressBar.setName("progressBar"); // NOI18N

    org.jdesktop.layout.GroupLayout statusPanelLayout = new org.jdesktop.layout
                                                        .GroupLayout(statusPanel);
    statusPanel.setLayout(statusPanelLayout);
    statusPanelLayout.setHorizontalGroup(
        statusPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout
                                              .LEADING)
        .add(statusPanelSeparator, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
             423, Short.MAX_VALUE)
        .add(statusPanelLayout.createSequentialGroup()
            .addContainerGap()
            .add(statusMessageLabel)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 227,
                             Short.MAX_VALUE)
            .add(progressBar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                 org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                 org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
            .add(statusAnimationLabel)
            .addContainerGap())
    );
    statusPanelLayout.setVerticalGroup(
        statusPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout
                                              .LEADING)
        .add(statusPanelLayout.createSequentialGroup()
            .add(statusPanelSeparator, org.jdesktop.layout.GroupLayout
                 .PREFERRED_SIZE, 2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED,
                             org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                             Short.MAX_VALUE)
            .add(statusPanelLayout.createParallelGroup(org.jdesktop.layout
                                                       .GroupLayout.BASELINE)
                .add(statusMessageLabel)
                .add(statusAnimationLabel)
                .add(progressBar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                     org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,
                     org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
            .add(3, 3, 3))
    );

    setComponent(mainPanel);
    setMenuBar(menuBar);
    setStatusBar(statusPanel);
}// </editor-fold>

private void tester(java.awt.event.MouseEvent evt) {

    Converter converter = new Converter();
    jTextArea2.setText(converter.fixParsedParagraph (jTextArea1.getText()) );
}

// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTextArea jTextArea2;
private javax.swing.JPanel mainPanel;
private javax.swing.JMenuBar menuBar;
private javax.swing.JProgressBar progressBar;
private javax.swing.JLabel statusAnimationLabel;
private javax.swing.JLabel statusMessageLabel;
private javax.swing.JPanel statusPanel;
// End of variables declaration

private final Timer messageTimer;
private final Timer busyIconTimer;
private final Icon idleIcon;
private final Icon[] busyIcons = new Icon[15];
private int busyIconIndex = 0;

private JDialog aboutBox;
}

This is the code that netbeans automatically generates for my GUI.

So, is there something that needs to be fixed in it?

+3
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2 answers

The Java virtual machine accepts two command line arguments that set the size of the initial and maximum heap:

-Xms and -Xmx. For example, if you want to give your Java program a 64-bit initial and maximum heap size of 256 MB, you can run it as follows:

java -Xms64m -Xmx256m my_prog
+1
source

, tutorial. 200 000 . , ?

import javax.swing.*;
import java.awt.*;

public class JTextAreaPasteTest {

    private String testStr = "Paste text here.";

    public static void main(String argv[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JTextAreaPasteTest();
            }
        });
    }

    public JTextAreaPasteTest () {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE);
        PasteArea wrapArea = new PasteArea("Paste text here.");
        frame.setLayout(new FlowLayout());
        frame.add(new JScrollPane(wrapArea));
        frame.pack();
        frame.setVisible(true);
    }

    private static class PasteArea extends JTextArea {

        public PasteArea(String str) {
            super(str, 20, 40);
            this.setLineWrap(true);
            this.setWrapStyleWord(true);
            this.setCaretPosition(str.length());
        }
    }
}
+1

Source: https://habr.com/ru/post/1732012/

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